How is it possible that I cannot enable your add-in? What are “disabled items”?

You may be at some point be faced with the following situation while trying to enable an add-in: you select the checkbox next to the name of the add-in, close the window, open it again, but the checkbox is not selected.

If you see an error message in this case, it means that Microsoft Outlook tried to load the add-in, but something caused an error during the attempt. In this case you should contact our technical support service.

However, if there is no error message displayed, in most cases it means that the add-in is in the list of “disabled items” and Microsoft Outlook did not even try to load it.

To look through the list of “disabled items”, select “About Microsoft Office Outlook” in the “Help” menu and click the “Disabled Items…” button in the dialog box. Find the add-in in the list, select it and click “Enable”. After that enable it as you did it before in the COM add-ins (menu "Tools \ Options \ Other \ Advanced Options \ COM add-ins" in Microsoft Outlook 2002/2003 or "Help \ Privacy Options \ Add-ins \ COM add-ins \ Go..." in Microsoft Outlook 2007).